Gas in Oil?

Hi, older craftsman riding mower 12 HP Briggs and Stratton engine. Went to change oil after sitting over the winter and when I removed the oil plug, the oil poured out almost looking like dark water. Smelled like gas. Can gas get into the oil somewhere? And if so, where would be the places to check? Thanks very much for any help.

Re: Gas in Oil?

Needle valve in carb is leaking. Gas will get into an open intake valve and seep past the rings or in some carbs can also run into the engine breather hose into the crankcase. Need to take carb apart and clean real well.

Re: Gas in Oil?

Best thing to do is just get a repair kit and give it a good cleaning, and hope that gets it. some carbs have a replaceable seat which requires pulling it out and pressing the new on in, but other then that you be straight forward.

Re: Gas in Oil?

Can't thank you enough for the help. The mower is my father's, he is 97 years old and still wants to live in his house and not a home. I promised him he could stay. Little did I know the issues that would come up i.e. the grass cutter. Do all the work on my own cars (extensive) so should not be that difficult. Just did not know tractors so thus the questions. Really appreciate the response. Will take some pics as I go and post for someone else that might need the help. Going to work on it this weekend.